package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ReportMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.extractor.ExcelExtractor;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private ReportMapper reportMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        //定义集合接收应统计的每一天
        List<LocalDate> dateList = new ArrayList<>();
        //将第一天放入集合
        dateList.add(begin);
        //判定当前添加的事情是否为最后一天
        while (!begin.equals(end)){
            //调用日期的plusDays方法
            begin= begin.plusDays(1);
            dateList.add(begin);
        }
        //定义集合接受每天营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //获取当天的开始时间与结束时间(时分秒格式）
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer status = Orders.COMPLETED;
            //定义map集合接收查询条件
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",status);
            Double turnover = reportMapper.getByMap(map);
            turnover = turnover==null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        return TurnoverReportVO.builder()
                .dateList( StringUtils.join(dateList, ","))
                .turnoverList( StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //定义集合接收应统计的每一天
        List<LocalDate> dateList = new ArrayList<>();
        //将第一天放入集合
        dateList.add(begin);
        //判定当前添加的事情是否为最后一天
        while (!begin.equals(end)){
            //调用日期的plusDays方法
            begin= begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //获取当天的开始时间与结束时间(时分秒格式）
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("end",endTime);
            Integer totalUser = reportMapper.getUserByMap(map);
            map.put("begin",beginTime);
            Integer newUser = reportMapper.getUserByMap(map);
            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //订单数集合
        List<Integer> orderCountList = new ArrayList<>();
        //有效订单数集合
        List<Integer> validOrderCountList = new ArrayList<>();
        //订单总数
        //订单完成率
        for (LocalDate date : dateList) {
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            //每天订单数和日期内总数量
            Integer status = null;
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",status);
            Integer totalOrder = reportMapper.getOrdersByMap(map);
            orderCountList.add(totalOrder);

            //每日有效订单数和日期内有效订单数总量
            status = Orders.COMPLETED;
            map.put("status",status);
            Integer validOrder= reportMapper.getOrdersByMap(map);
            validOrderCountList.add(validOrder);
        }
        Integer orderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate=0.0;
        if(validOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / orderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCompletionRate(orderCompletionRate)
                .orderCountList(StringUtils.join(orderCountList,","))
                .totalOrderCount(orderCount)
                .validOrderCount(validOrderCount)
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .build();
    }

    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        Integer status = Orders.COMPLETED;
        List<GoodsSalesDTO> goodsSalesDTOList = reportMapper.getByTime(beginTime,endTime,status);
        List<String> name = goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> number = goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String nameList = StringUtils.join(name, ",");
        String numberList = StringUtils.join(number, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();

    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().plusDays(-30);
        LocalDate end = LocalDate.now().plusDays(1);
        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN),LocalDateTime.of(end,LocalTime.MAX));
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("\\template\\运营数据报表模板.xlsx");
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            XSSFSheet sheet = excel.getSheet("sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间：" +begin+ "至" + end);
            //获取第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            //获取第五行
            XSSFRow row1 = sheet.getRow(4);
            row1.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row1.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for (int i = 0;i < 30; i++){
                LocalDate localDate = begin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(localDate, LocalTime.MIN), LocalDateTime.of(localDate, LocalTime.MAX));

                row= sheet.getRow(7 + i);
                row.getCell(1).setCellValue(localDate.toString());
                row.getCell(2).setCellValue(businessData.getUnitPrice());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            out.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
